raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:438207

Severe autosomal recessive macrothrombocytopenia

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy
Status
active

A rare isolated hereditary giant platelet disorder characterized by severe thrombocytopenia and thrombopathy due to defects in proplatelet formation and platelet activation in homozygous patients. Clinical manifestation are recurrent bleeding episodes including epistaxis, spontaneous hematomas, and menorrhagia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSevere autosomal recessive macrothrombocytopenia
frMacrothrombocytopénie sévère autosomique récessive
deMakrothrombozytopenie, schwere, autosomal-rezessive
esMacrotrombocitopenia grave autosómica recesiva
itMacrotrombocitopenia grave autosomica recessiva
nlErnstige autosomaal recessieve macrotrombocytopenie
ptMacrotrombocitopenia autossómica recessiva grave
plCiężka autosomalna recesywna makrotrombocytopenia
csTěžká autozomálně recesivní makrotrombocytopenie
ukТяжка аутосомно-рецесивна макротромбоцитопенія
zh严重常染色体隐性遗传性巨血小板减少症
trAğır otozomal resesif makrotrombositopeni

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM616176BTNTvalidated
OMIM620757BTNTvalidated
ICD-10D69.1NTBTattributedvalidated
ICD-113B62.01NTBTattributedvalidated
MONDO0014518Evalidated
UMLSC5569048Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
PRKACGDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:9382ENSG000001650591768939q21.11protein kinase cAMP-activated catalytic subunit gamma25061177[PMID]
GNEDisease-causing germline mutation(s) inAssessedHGNC:23657ENSG000001599216038249p13.3glucosamine (UDP-N-acetyl)-2-epimerase/N-acetylmannosamine kinase30171045[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families2 casesWorldwideCase(s)Validated25061177[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_25061177[PMID]

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card